'too cartoony'
I'm sorry, but what? This is damn Jim Henson creature shop. Of course it's cartoony. I mean the only thing that looked real in Labyrinth is when the sheepdog would be a puppet instead of a real dog.
I don't understand that critique. Trust me, I'm ALL for realistic things. But when I think of Jim Henson, I don't think of incredible realism.
It should move believably and not have tacky obvs fur and robotics, and seem legitimately alive... etc... but as far as looking kinda goofy or not like a realistic, real animal...again, I feel like that's part of the Jim Henson-ness.
(Personally I didn't like Ben's either, but I felt that "cartoony" critique wasn't valid. And they said it with the lilypad head too, which was probably my favorite.)